Trimming machine



June 29, 1937. G. ROSENBERGER TRIMMING MACHINE Filed April 23, 1956 FIG. 2

INVENTOR. Geopae j icasenbepaer ATTORNEY.

Patented Jane 29, 1937 YES rarest is TRIMIVHNG MACHINE George Rosenberger, Muncie, ind.

Application April 23, 1936, Serial No. 75,907

8 @laims (Cl. 16469) This invention relates to improvements in apparatus for the severing of the edges of wall paper rolls.

Problems involved in the maturing of the present invention have been those incident to the fact of wall papers being varied in structure, thickness and widths, and of their being varied as to closeness of the laps one upon the other, of the roll; and of their being varied as to the diameter of the central opening or bore of the roll.

Advantages sought to be obtained are, that the severance may be incisive, clean, and on a true straight line, and that the severed portion or strip in its leaving the roll may not become uncoiled or disarranged. Other advantages desired are that the apparatus therefor may be economical of construction, durable, and not liable to get out of order or repair, and that the invention may be practiced by the exercise of only ordinary skill.

The foregoing advantages are made possible,

and the objects of my invention are accomplished by the new construction, combination, and arrangement of parts described in the following specification and illustrated in the accompanying drawing. The invention is defined in the appended claims.

The several parts of my improved apparatus, as they appear in the different views in the drawing, are identified by suitable characters of reference applied to them.

In the drawing Figure 1 is a front View of my improved apparatus, the top portion of the guard shield being broken away.

' Figure 2 is a top plan view of Figure 1, the upper portion of the guard shield being broken away.

Figure 3 is an enlarged vertical cross section view taken on the line 33 and in the direction of arrow 3 in Figure 1.

Figure 4 is a horizontal cross section view taken on the line 44 and as seen in the direction of arrow 4 in Figure 3.

Figure 5 is a view of the roll support mandrel.

On a shaft I which is journaled in fixed pillow blocks 2 and 3, and which is actuated, through a (hereinafter referred to as sleeve journal) that is externally threaded. This sleeve journal is retained in threaded aperture therefor in pillow block 6. The other end of the shaft Iii is journaled in the pillow block I. The inner end of the said sleeve journal bears against annular shoulder I3 of said shaft l0. Nut I4 which is screwed on the threaded end of the portion l l of said shaft and to engagement with annular seat 15 so retains the said shaft, that whereas the said shaft is free to move rotatively in the sleeve, it is held against longitudinal movement therein.

Similar arms l6 and il, spaced as shown in Figure 1 and in Figure 2 are secured to said shaft iii, the centers of their heads being in axial alignment. In the head end of arm H is a tail center block !8 and which is adjustable, as by a nut I9. At the head end of arm I5 is integrated a thimble 23 in whose bore is slidingly retained a bolt 2| having center bore 22. In an L shaped slot having cross portion 24 and longitudinal portion 23 (see Figure 2) in said thimble is received a knob 25 which projects radially from the said bolt 2|. Secured to said arm I6 is a face plate 36 and which may be of circular formation, as shown in Figure 3.

A holder device carried by said plate 36 consists of a stem 31 having knurled body portion and which is threaded through a boss 32.

A disk shaped head 33 journaled on said stem, is held against movement rotatively, by a longitudinal pin 3 fixed thereto and which is received slidingly in a bore therefor in the said face plate 39.

The structure just described, composed essentially of the shaft l0 and arms l6 and I1, and which is supported by the pillow blocks 6 and I may be designated as a carriage. By a flexible stay member such as a chain 38 whose one end is secured to the head of arm I! and whose other end is made fast to a clip 39 at the base plate, the carriage is retained at a retracted position, spaced from the knife as shown in Figure 3. The shaft [5 being journaled in the pillow block 7 and in the sleeve journal l2 of pillow block 6, the carriage is capable of being swung toward, and of being swung from the knife. The carriage is movable longitudinally by turning the sleeve journal l2.

At position adjacent to the circular knife 5, is a base block ll from whose side protrudes a stud 42. A guard circlet 43 for the knife is supported by the said base block. A stop arm 45 is secured to said shaft l8 and it is set at such angle of inclination with relation to the axial center of the heads of arms l5 and I7, that when the carriage will have been swung forwardly, or to the projected position indicated by the broken lines in Figure 3, the said stop arm will have come into engagement with the stud 42. The carriage is thereby stayed at such position that there is ample clearance between the edge of the knife and the mandrel presently to be referred to and which is carried by said arms l6 and H. The said stop arm also functions as a shield to guard the operators hand against accident.

An arbor 48 which embodies a disk-like seat member 39 is disposed with its center bore 50. in engagement with the tail block center I8; its other and pointed end being received in the center 22 of bolt 2!. It is designated as the roll mandrel. So called because of its function of supporting the paper roll for the operation of severing the edge of the latter. The mandrel,

, as it appears removed from the position demandrel.

scribed, is shown in Figure 5. It will be observed that the end portion 5! is of reduced diameter. By this formation its base being of conical taper it functions as a pilot facilitating the in serting of the mandrel into the bore of the paper roll; it also affords clearance for the edge of the knife so that the innermost lap of the paper roll may be severed without danger of injury either to the roll or to the knife.

The 'best results are had when the mandrel diameter is approximately the diameter of the bore of the paper roll. Inasmuch as the rolls are varied as to the diameter of the bores thereof, the apparatus which is intended for the requirement of a usual wall paper establishment handling many makes of paper, includes mandrels of different diameters.

The positions of the several parts of the apparatus, in readiness for use, are as shown in the drawing. The operator pulls knob up cross slot 24 and to right in longitudinal slot 23, the bolt 2i thereby being shifted to position disengaged from the mandrel, and which is then removed. The operator then with mandrel in his left hand, threads a paper roll thereon and which comes to rest on the seat 49. The mandrel, with the roll thereon, is then disposed with its seat bore 58 engaged with the tail center is, and its head end 5| in registration with the bolt 2|. Operator then moves knob 25 to left, the centerbore 22 of the bolt 2i engaging the point of said Knob 25 is then moved down the cross portion 2a of the slot of the thimble, the boltbeing thereby locked against longitudinal movement, and the mandrel accordingly being similarly held. Now the operator with left hand stays the roll at its position against the mandrel seat 48, and as he turns the sleeve journal l2 clockwise the carriage is shifted to the left (the direction indicated by the arrow in Figure 2), the roll being thereby brought to position wherein the line upon which the roll edge is to be severed, is in line with the cutting plane of the knife 5. Holder stem is then turned clockwise until its head 33 .will have met the end of the paper roll, its function being to stay the roll against longitudinal displacement. It will be understood that the engagement by the head 33 is not such as to prevent the roll from moving rotatively on its mandrel when the roll is brought into contact with, and is moved to its distination, in its engagement with the circular knife.

The knife is moving in the direction indicated by the arrow thereon in Figure 3. The direction of the windings of the roll, with relation to the direction of the motion of the rotating circular knife, is indicated by the broken lines in Figure 3.

The operator now with his right hand at the thimble 2G pushes the carriage forwardly, or toward the knife. The influence of his left hand, as it rests on the paper roll, is such as to permit the roll to rotate, but to prevent it from spinning. The action of the knife, as the roll, so controlled as aforesaid, is transported forwardly in its arcuate path, is to shear, the bevel of the knife facing toward the right hand edge of the roll. The effect is the shearing off, of the edge portion of the roll. The severing is smoothly, cleanly, and efiectively done; there is no tendency to'stripping or tearing; the line of severance is straight and true, and the severed quota readily leaves the roll and it will not have been disturbed sufficiently to cause it to unwind.

The degree of pressure applied by the operator 7 mined by the operator, he having in mind, the

nature, the condition and structure of the paper, the closeness of its engagement with the mandrel, and the closeness of the laps of the roll, one upon the other. The apparatus so lends itself to the meeting of all of the above named conditions, that a person of ordinary skill is enabled to rapidly and efficiently handle the paper rolls as they come, in their varied kinds.

There being no tendency of the severed portion of the roll to unwind, it is carried on the end of the mandrel. The operator then moves knob 25 up to the longitudinal slot 23 and shifts bolt to the right, the said mandrel thereby being released. The operator then removes the mandrel with its trimmed roll thereon, and the coiled edge strip is discarded, and the roll removed from the mandrel.

My improved machine, lending itself as it does, to simplifying the handling of the rolls, and rendering unnecessary any handling of'the severed strip material other than the discarding thereof, makes for facility, economy and efficiency in the handling and retail merchandising of the wall paper, and in the handling of same by the'consumer. By having on hand a plurality of mandrels, there is afforded increased convenience in the handling of quantity.

When it maybe desired to sever the opposite end of the roll, the roll is placed on the mandrel in position opposite to the position as illustrated in Figure 3. The power shaft is operated in direction reverse to that which has just been described, the knife then moving in direction opposite to that indicated by the arrow.

Whereas in the present exemplification of my invention I have shown and described features and details of preferred construction and arrangement, it will be understood that changes and modifications may be made therein, within the scope of the invention as same is defined in' the appended claims, without departing from the nature or principle of my invention or sacrificing any of its advantages.

What I claim as my invention, is-- 1. An apparatus of the kind described, comprising a rotative circular knife, mountings therefor,

a carriage structure mounted adjacent to and having opposed aligned bearingswith their axes parallel with the axis of said knife, one of said bearings being at a plane adjacent to the plane of the knife, the saidcarriage being yieldingly re- '5.

tained, but which is adapted to be moved toward and from said knife, and a mandrel, one end portion thereof being of reduced diameter and the other end portion thereof being provided with an abutment plate against which the wall paper roll becomes seated when the latter is threaded on the mandrel, the ends of the mandrel being so adapted to said bearings, that the mandrel may be manually positioned in engagement with, and it may be manually removed from said bearings.

2. An apparatus of the kind described, comprising a rotative circular knife, mountings therefor, a carriage structure mounted adjacent toand having opposed aligned bearings with their axes parallel with the axis of said knife, one of which said bearings is adapted to be locked in and unlocked from its operative position, the said carriage being yieldingly retained, but which is adapted to be moved toward and from said knife, means to limit the distance of the movement of the carriage toward said knife, and a mandrel journaled in said carriage bearings and having a cross head member at one end and against which the paper roll becomes seated when the latter is threaded on the mandrel.

3. An apparatus of the kind described, comprising a rotative cutter disk, mountings therefor, a carriage structure mounted adjacent to and having opposed aligned bearings with their axes parallel with the axis of said cutter disk, the said carriage being yieldingly retained but which is adapted to be moved toward and from said cutter disk, means operable to move the carriage to and to retain it in adjusted positions longitudinally, a headed mandrel removably journaled in said carriage bearings, and upon which said mandrel a paper roll is threaded, and a device on the carriage which is operable to bear against the end of the paper roll to hold the latter against longitudinal movement but which permits the said roll to move rotatively.

4. In an apparatus of the kind described, in combination, a rotary knife, a carriage structure mounted adjacent to the rotary knife, and having opposed aligned bearings with their axes parallel with the axis of the knife, one of said bearings being at a plane adjacent to the plane of the knife, and the said carriage being movable toward and from the knife, a mandrel one end portion of which is of reduced diameter, and other end portion of which is provided with an abutment plate, the ends of the mandrel being so adapted to the said bearings, that the mandrel may be manually disposed in and taken from its engagement with said bearings.

5. In a machine of the kind described, comprising a circular rotative knife, a mandrel upon which to retain a wall paper roll for the subjecting of the latter to the severing action of the said knife, consisting of a shaft one end portion of which is of reduced diameter, and the other end portion of which is provided with an abutment plate to constitute a seat for the wall paper roll when the latter is threaded on the shaft.

6. In a machine of the kind described, comprising a rotary knife, a mandrel upon which to retain a wall paper roll for the subjecting of the latter to the severing action of said knife, consisting of a shaft having one end portion of pointed formation, and of reduced diameter a predetermined distance and thence enlarged in cone shaped formation, the other end portion of the shaft being provided with a cross plate to constitute a seat against which the wall paper roll is positioned when the latter is telescoped on the shaft.

7. In an apparatus of the kind described, in combination, a rotary knife, a carriage structure mounted adjacent to the rotary knife and having opposed aligned bearings with their axes parallel with the axis of the knife, a mandrel having its ends so adapted to said bearings that it may be manually disposed in and removed from its engagement with said bearings, a portion of said mandrel being of reduced diameter, and the por. tion of said mandrel remote from said reduced portion being provided with an abutment.

8. An apparatus of the kind described, comprising a rotative circular knife, mountings therefor, a carriage structure related to and having opposed aligned bearings with their axes parallel with the axis of the knife, and the said carriage being adapted to be moved toward and from said knife, a mandrel having its ends so adapted to said bearings that it may be manually disposed in and removed from its engagement with said bearings, the said mandrel being of reduced diameter at the portion thereof which is coincident with the plane of the knife, and there being an abutment on that portion of the mandrel which is remote from the said reduced portion, and a holder member adjacent to the bearing that is adjacent to the knife whereby to engage the end of the wall paper roll at a point spaced from the plane of the cutting edge of the knife.

GEORGE ROSENBERGER. 

